The importance of water cannot be overemphasized. Birds are notorious for dropping things in their water bowls and creating a quagmire of decaying food. To overcome this problem, the water bowl should be as far away from the food as possible. Resorting to a water bottle is somewhat of a good idea, but water still needs to be changed on a daily basis. Breeding setups often have a flush system, making it possible to flush the water receptacle at least twice a day. If you use a water bottle, it is still ideal for the birds to have access to a bowl of water to bathe in.